Hoist line tool



June 12, 1934. ER 1,962,129

HOIST LINE TOOL Filed April 27, 1933 4 Sheets-Sheet l Inventor flllorney June 12, 1934. H. L. BERKEY 1,962,129

HOIST LINE' TOOL Filed April 27, 1933 4 Sheets-Sheet 2 I Invenior 5f L. Ear/raj 4 Home y June 12, 1934. L BERKEY 1,962,129

HOIST LINE TOOL Filed April 27, 1955 4 Sheets-Sheet 3 Lav/52 By June 12, 1934. BERKEY 1,962,129

HOIST LINE TOOL Filed April 27, 1933 4 Sheets-Sheet 4 fl Home y the device with the latch in retreating position als designate like parts, it can be seen in the Patented June 12 1934 um'rso STATES PATENT OFFICE nois'r LINE TOOL Harry L. Berkey, Marion Center, Pa.

Appiieaiionkprii 27, 1933, Serial No. 668,264

5 Claims. (01. 254- 75) v This invention appertains to new and useful improvements in hand operated hoist line tools and the principal object of the invention is to provide a tool for manual operation adapted for moving heavy objects.

Another important object of the invention is to provide a hoisting apparatus which is provided with automatic means permitting retreat or advance motion on a load suspension chain.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:

Figure 1 represents a side elevational view of the device with one of the hooks engaged with the suspension chain.

Figure 2 represents an end elevational view of the device.

Figure 3 represents a horizontal sectional view through the device.

Figure 4 represents a vertical sectional view taken substantially on line 44 of Figure 1.

Figure 5 represents a side elevational view of the device with the opposite hook engaged with the suspension chain at the completion of onehalf cycle with the latch engaged for advance motion.

Figure 6 represents a side elevational view of the device at the completion of one full cycle of operation starting with the position shown in Figure 1.

Figure '7 represents a side elevational view of the device with the latch retracted for retreat motion of the device on the suspension chain.

Figure 8 represents a side elevational view of and showing the completion of a one-half cycle of operation, starting with the position shown in Figure 7.

Referring to the drawings wherein like numerdrawings that numeral 5 represents a yoke from which the handle 6 extends. As can be seen in Figure 4, a clevis 7 has its leg portions provided .with registering openings to receive the cross pin 8 of the yoke whereby the clevis is swingably supthese pass through the inner end portions of the U-shaped links 1 1. The studs 13 are provided with cotter keys 15 to prevent displacement of the links 14 therefrom.

The upper ends of the links 14 are connected by the link 16, screws 17 being employed to make this pivotal connection and these screws also serve to secure the lower ends of the coiled extensible springs 18 to the upper ends of the links 14, as in the manner substantially shown in Figures 1 and 2.

The opposed sides of the hooks 11 and 12, slightly inwardly of their claw-like heads 19 have the slotted protuberances 20 whereby the links of the suspension chain 21 are guided to permit proper engagement of the heads 19 with the links of the chain.

It can further be seen that the link 16 is provided at the intermediate portion thereof with a tapered notch 22 for receiving the tapered end portion 23 of the bolt 24 which is slidable in the barrel 25, the latter being suitably secured to one side of the yoke 5.

This barrel 25 is provided in its outer side portion with'a bayonet slot 26 which receives the headed end portion 2'7 of a screw 28 which is threaded into the aforementioned bolt 24.

The lower end of the barrel 25 is internally threaded to receive the threaded plug 29 and interposed between this plug 29 and the lower end of the bolt 24 is the coiled compressible spring 30. Obviously, by adjusting this plug 29 in the barrel 25, proper adjustment of the coiled spring can be obtained.

Referring again to Figure 1, it can be seen that the head portions of the hooks 11l2 are provided with projections 31 to which the upper ends of the springs 18 are secured.

Referring particularly to Figure 2, it can be seen that an eye member 32 is swivelly connected to the lower bight portion of the clevis 7 and through this extends the ring 33 on the connection between the clevis and the hook 34 upon which the load supporting chain 35 is supported.

In the operation of automatically advancing the tool for lifting a load, the bolt 24 is released so that its extension 23 engages into the notch 22 of the link 16 in the manner shown in Figures 1, 5 and 6.

Obviously, this holds the inner ends of the springs 18 fixed with respect to the yoke 5 and lever 6. First engage the hook 12 with the chain 21 in the manner shown in Figure 1 and then apply a load to the chain 35. Now adjust the lever 6 to a position slightly beyond the position shown in Figure 5 and hook 11 automatically engages with the chain 21. The hooks are both engaged with the chain 21 at this point. Now adjust the lever to the position shown in Figure 5. Hook 12 automatically disengages from the chain 21. Now adjust the lever to a position slightly beyond the position shown in Figure 6, whereupon hook 12 engages with chain 21. The hooks are both engaged with the chain 21 at this point. Now adjust the lever to the position shown in Figure 6 and hook 11 will automatically disengage from the chain 21. Now adjust the lever to the position shown in Figure 1 and one cycle has been completed. The tool has advanced along the chain 21 four links.

In the operation of automatically retreating the tool along the chain 21, the bolt 24 is released from the link 16. When this is done, engage the hook 12 with the chain 21, Figure '7. Impose a load on the chain and subsequently adjust the lever to a position slightly preceding the position shown in Figure 8 and hook ll automatically engages with the chain 21. When both hooks l1 and 12 are engaged with the chain, adjust the lever to the position slightly preceding the position that would be the reverse of the position shown in Figure 8. The hook 12 has automatically engaged with the chain 21. Hooks 11 and 12 are now both engaged with the chain. Adjust the lever to the opposite position and the hook 11 automatically disengages from the chain 21.

This cycle of operation can be repeated as often as desired to move the device to the desired position on the chain 21.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the claimed as new is:-

l. A hoist line tool comprising a lever having a yoke, a pair of hook members swingably mounted invention, what is i on the yoke, a pair of link members each pivotally connected to the yoke, means for connecting a load supporting chain to the yoke, a pivotal connector between the links, and a spring between each link and the corresponding hook.

2. A hoist line tool comprising a lever having a yoke, a pair of hook members swingably mounted on the yoke, a pair of link members each pivotally connected to the yoke, means for connecting a load supporting chain to the yoke, a pivotal connector between the links, a spring between each link and the corresponding hook, and a latch on the yoke for retaining the said connector and links fixed with respect to the yoke.

3. A hoist line tool comprising a lever having a yoke, a pair of swingable hooks on the yoke, a pair of swingable link members on the yoke, a third link member pivotally connected at its ends to the free ends of the first mentioned links, spring members interposed between the last mentioned ends of the said pair of links and the hook members and means for connecting a load suspending chain to the yoke.

4. A hoist line tool comprising a lever having a yoke, a pair of swingable hooks on the yoke, a pair of swingable link members on the yoke, a third link member pivotally connected at its ends to the free ends of the first mentioned links, spring members interposed between the last mentioned ends of the said pair of links and the hook members, means for connecting a load suspending chain to the yoke, and a retractile latch on the yoke for securing the said links fixed with respect to the yoke.

5. A hoist line tool comprising a lever having a yoke, a pair of swingable hooks on the yoke, a pair of swingable link members, a third link member pivotally connected at its ends to the free ends of the first mentioned links, spring members interposed between the last mentioned ends of the said pair of links and the hook members, means for connecting a load suspending chain to the yoke, and a retractile latch on the yoke for securing the said links fixed with respect to the yoke, said third link member connecting the said pair of links having a notch therein for receiving the said latch.

HARRY L. BERKEY. 

